20250310 finished.

src/problem/mod.rs

@@ -528,3 +528,5 @@ mod p2597_the_number_of_beautiful_subsets;
 mod p2234_maximum_total_beauty_of_the_gardens;
 
 mod p2070_most_beautiful_item_for_each_query;
+
+mod p2269_find_the_k_beauty_of_a_number;

src/problem/p2269_find_the_k_beauty_of_a_number.rs

@@ -0,0 +1,36 @@
+/**
+ * [2269] Find the K-Beauty of a Number
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn divisor_substrings(num: i32, k: i32) -> i32 {
+        let k = k as usize;
+        let num_str: Vec<char> = num.to_string().chars().collect();
+
+        (0..=num_str.len() - k)
+            .into_iter()
+            .map(|i| {
+                (&num_str[i..i + k])
+                    .iter()
+                    .fold(0i32, |v, c| v * 10 + c.to_digit(10).unwrap() as i32)
+            })
+            .filter(|&v| v != 0 && num % v == 0)
+            .count() as i32
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2269() {
+        assert_eq!(2, Solution::divisor_substrings(240, 2));
+        assert_eq!(2, Solution::divisor_substrings(430043, 2));
+    }
+}